Please Apple, explain why iOS 8 was born, it caused a lot of issues.

Question

Hi There,
Last Monday i went to the Apple Store, and received a new iPhone 5s, with a swap repair. I was very exited and happy with it, until.... IOS 8.0.2. showed up.
i did an OTA update and everything went fine, until the moment i would like to place a call or do something, that need to make a connection with my mobile provider.
For exemple, browse the internet using 3G, Change settings which have something to do with my provider, like turn on or off caller id, or anything like that. The worst of all is that i can't receive any sms, or incoming call.  And when i would like to place a call, I've got the message Call Filed, please try again, and if im lucky it would work after pressing try again for something like 10 times.
So what I've tried to fix this issue is,
Restore all network settings, (it dit work for a few minutes) after those minutes the same issue...
Restore complete back to default fabric settings of iOS 8.0.2. without placing back an backup. (it doesn't work)
And since apple still provides iOS 8.0, I've even tried to restore from 8.0.2 to 8.0 it so technically I've downgraded. (but still no luck)
And even though the device is just a few days old, I've tried to remove, clean  and replace the sim card. (but it still doesn't work, again a five minute fix...)
Temporary fixes that worked for max 5 minutes or less.
Turnning on and of airplane mode.
Like i said before, I've tried to remove, clean  and replace the sim card.
and last but not least Rebooting the device...
So i've got one question left, please Apple  re provide iOS 7.1.2 again, until all of the iOS 8, 8.0.2 bugs are fixed. Cause if the main reason of purchase every iPhone that introduced the world was stability and a overall amazing good quality, but right now im stuck with a to expensive iPod touch in the skin of an iPhone 5s.. and really unstable, it is the exact opposite from what everyone expect from an quality brand like Apple. i hope that there is a way to deal with this issues for good... Thanks a lot!

Answer 1

Apple is not on here, we are all fellow uSers, not Apple employees.  Apple merely provides the site for us to discuss and help with technical problems each other is having.
Apple does not support downgrading an iOS, and removes the older version's files from the server when the new version becomes available.  There is no legitimate way back.
You can give Apple feedback at http://www.apple.com/feedback